ON THE DIFFERENT VELOCITIES OF INLET BOUNDARY CONDITIONS FOR HUMAN ARM ANALYSIS OF ARTERIAL FLOW USING ONE-WAY FLUID-SOLID COUPLING

Simulations for blood hydrodynamic problems have been still largely incomplete despite years of research, especially for the inlet of boundary conditions that served as an essential part in computational fluid dynamics simulations of blood flow in human arteries. In this paper, the four different velocities of inlet boundary conditions were tested and compared in the human arm arterial model developed by us previously. Based on the selected points of nine key areas in the blood model,(14) we analyzed the calculation results of pressure and shear stress distributions in detail. Our results show that they are changeable in different V-max (different peak velocities of inlet boundary). The results further show that the static pressure of the aortic tree is higher than the static pressure of the branch, while the shear stress of the aortic tree is lower than the shear stress of the branch. On the other hand, the velocities changed in different V-max, the vessel walls of max total deformation appear in the middle radial obviously, compared with the equivalent and shear stress show at the entrance and bifurcations. In all, the simulation results of the brachial arteries provide the wall deformation, pressure and shear stress characteristics in different V-max, and offer a new strategy to study the two-way coupling of hemodynamics in the arm arterial model.